The Modular Construction System

What you should know about the GL screw joint system

The GL thread is the most common thread on lab equipment made of glass. BOLA offers a modular construction system with many different components with GL threads. All components can be combined and thus allow an easy transition from glass to plastic accessories.

Using BOLA Laboratory Screw Joints you can simply connect tubes or tubing made of glass, metall or plastics directly to GL threaded sockets, no matter whether it is an reactor lid made of glass or a BOLA GL-Fitting in PTFE or a bottle distributor made of PP.

Being assembled of sealing ring, tapered ring and v-ring, BOLA Laboratory Screw Joints provide a tight connection which is suitable for pressure and vacuum applications.

Furthermore, by exchanging the inner parts only, tubing with different outer diameters can be connected to the same GL thread. This way you can connect e. g. to a GL 14 thread tubing with an outer diameter from 0,8 to 8,00 mm. This system allows also to use BOLA GL Fittings for the assembly of a tubing reduction.

All advantages at a glance

  • easily screwable without any tooling
  • optionally extensible
  • independent from tubing diameters
  • compatible with glass equipment with GL thread
  • many creative possibilities
  • no determination at the beginning of assembly

But the BOLA GL Screw Joint System offers more opportunities than onlyjoining tubes/tubing.

The GL thread offers unlimited combinations of the different components and allows to create complete equipment. Furthermore, all assembled equipment is compatible with standard glass components and expandable at any time.

Being made of fluoroplastics or other high-performance plastics such as PPS and ETFE, all products have a very good thermal resistance and are suitable for high temperatures up to +250 °C.

The schematic drawing shows how to combine our different components of the BOLA GL Screw Joint System:

By means of Multiple Distributors for Bottles and Laboratory Screw Joints, tubes and tubing can be inserted to the bottom of the flask and fixed in any requested height.

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